def __init__(self):
"""Create library and ffi interfaces.
"""
self.gpiod = libgpiod.libgpiod()
self.lib = self.gpiod.lib
self.ffi = self.gpiod.ffi
# Inner Callback function
@self.ffi.callback(
"int (int evtype, unsigned int offset, const struct timespec *ts, void *data)"
)
def buttonCallback(evtype, offset, ts, data):
# Use a try/except or an exception will cause an endless loop
try:
if evtype == self.lib.GPIOD_CTXLESS_EVENT_CB_TIMEOUT:
rc = self.lib.GPIOD_CTXLESS_EVENT_CB_RET_STOP
print("Timeout")
else:
rc = self.lib.GPIOD_CTXLESS_EVENT_CB_RET_OK
if evtype == self.lib.GPIOD_CTXLESS_EVENT_CB_RISING_EDGE:
print("Rising edge timestamp %s" % time.strftime(
'%m/%d/%Y %H:%M:%S', time.localtime(ts.tv_sec)))
else:
print("Falling edge timestamp %s" % time.strftime(
'%m/%d/%Y %H:%M:%S', time.localtime(ts.tv_sec)))
except:
rc = self.lib.GPIOD_CTXLESS_EVENT_CB_RET_ERR
print("Unexpected error:", sys.exc_info()[0])
return rc
# Expose callback to object instance
self.buttonCallback = buttonCallback
def __init__(self):
"""Create library interface.
"""
self.i2c = libperipheryi2c.libperipheryi2c()
self.gpiod = libgpiod.libgpiod()
self.lib = self.gpiod.lib
self.ffi = self.gpiod.ffi
def __init__(self):
"""Create library and ffi interfaces.
"""
self.gpiod = libgpiod.libgpiod()
self.lib = self.gpiod.lib
self.ffi = self.gpiod.ffi